SharkD nous apporta ses lumieres en ce 2007/06/15 17:23:
> My question is: how do you simulate the visual distortions caused by high
> heat? I.e., how do you make the air wavy around jet exhausts or candle
> flames?
> 
> Thanks!
> 
> 
Use some totaly transparent (rgbt 1) object, apply some normal to it. Then give 
it an interior with an ior slightly less than 1, something in the 0.93~0.999 range.
In some cases, you may need to use an isosurface.
You may need to use more than one distording onjects, this can help you simulate 
variable ior, to a limit.

-- 
Alain
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You know you've been raytracing too long when you've ever "lost" a Julia fractal 
because you're not quite sure how to align things in four dimensions.
Dylan Beattie

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